Actually, I don't think it would. I think it could be done pretty easily. Now i kinda want to try it. Blending back in after boarding the new passengers... you would have total freedom if you didn't use your sign and sail card. Make a friend, they buy you drinks, eat at lido, hook up to sleep or sleep on serenity. steal a card and get off at the next port. Totally doableStowing away then sneaking off at another port not on your original itinerary would be pretty genius.